公开(公告)号：US09909637B2

公开(公告)日：2018-03-06

申请号：US15115786

申请日：2015-01-28

Applicant: NIFCO INC.

Inventor： Makoto Muranaka

IPC: F16D57/02 ,  F16F9/12 ,  F16F9/36

CPC classification number: F16F9/12 ,  F16F9/369 ,  F16F2230/30

Abstract: A damper device includes a stator, a rotor, and a viscous fluid imparting a resistance to a rotation or a relative rotation of the rotor, and forms a braking force by the resistance. In the rotor, an annular seal portion made of soft synthetic resin is provided by integral molding. The stator includes an annular space in which the viscous fluid is filled, and a main member portion of the rotor is housed in the annular space. The annular seal portion comprises an outside annular portion provided in an outer circumferential portion of the rotor; an inside annular portion provided in an inner circumferential portion of the rotor; and a connection portion therebetween.

公开(公告)号：US10267375B2

公开(公告)日：2019-04-23

申请号：US15529832

申请日：2015-11-20

Applicant: NIFCO INC.

Inventor： Makoto Muranaka

IPC: F16D57/00 ,  F16F9/14 ,  A47C1/02 ,  F16F9/12 ,  F16F9/00 ,  F16F15/14

Abstract: A damper (10) includes a housing (11) and a rotor (16) combined with the housing (11) so as to be capable of rotating relative to the housing (11). The damper (10) includes an attenuating medium (90) filled in a rotation area inside the housing (11) wherein the rotor (16) rotates, and added with viscoelasticity by a viscoelasticity treatment; and an enclosure portion (80) provided outside the rotation area of the rotor (16), and communicating with the rotation area.

公开(公告)号：US11415194B2

公开(公告)日：2022-08-16

申请号：US16609823

申请日：2018-05-18

Applicant: NIFCO INC.

Inventor： Makoto Muranaka

IPC: F16F15/16 ,  F16D41/066 ,  F16F9/12

Abstract: This damper comprises: a housing accommodating a damping medium; and a rotor rotatable relative to the housing, inside the housing. A unidirectional clutch which stipulates rotation in one direction and a rotating shaft can be connected to each other coaxially. The unidirectional clutch, when supporting the rotating shaft, constitutes a first input object, whereas the rotating shaft constitutes a second input object when not being supported by the unidirectional clutch. A connection object comprises a first connection part capable of connecting to the first input object coaxially, and a second connection part capable of connecting to the second input object coaxially. Two separate connection states are provided, namely a state in which the first connection part and the first input object are connected to each other, and a state in which the second connection part and the second input object are connected to each other.